Charlie’s stepmother with bright orange hair and a mysterious demeanor, who works as an herbalist and plays a pivotal role in guiding Charlie while blending into the family.

The primary antagonist with a dual identity as the principal of Charlie’s school and a tyrant in the Netherworld, who manipulates fear to maintain control.

A nightmare character mirroring Charlie’s fears, who initially appears to be the main villain but is revealed to be part of a larger scheme.

Charlie’s best friends, each confronting their own fears, who provide crucial support and demonstrate the strength of friendship in overcoming adversity.

Charlie’s younger brother, whose acceptance of their new life contrasts with Charlie’s struggle and serves as a catalyst for Charlie to confront his fears.

A gorgon sent to assist Charlie, initially grumpy but ultimately compassionate, guiding him through the Netherworld and revealing depth beyond his intimidating appearance.

Charlie’s father, a well-meaning but somewhat oblivious parent, who struggles to understand his son’s grief and the extent of his nightmares.